By having the DUTs download and extract from a CI-Tron artifact, we
deduplicate the downloading of the build artifact across all DUTs from
a CI farm, leading to quicker and more reliable jobs, and lower
bandwidth usage on both FD.o and the CI gateway.
Inside the CI-Tron infra, this should also drastically reduce the job
submission time by removing needless copies (executorctl -> executor,
executor -> S3, S3 -> B2C, and even B2C -> NBD when applicable).
As an additional bonus, the size of install.tar is reduced by virtue of
zstd providing better compression than zip/deflate.
Signed-off-by: Martin Roukala (né Peres) <martin.roukala@mupuf.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32927>